a New South Wales Dept. Mines Ann. Repts.
*> Tasmania Sec. for Mines Ann. Repts. Tasmania production all osmiridium. c India Geol. Survey Rec. d Production less than 1 ounce (0-31 ounce).
e Canada
Dept. Mines Ann. Repts. give the following figures (believed low):
1912, none; 1913, 13; 1914, none; 1915, 23; 1916, 15; 1917, 57; 1918,
39; 1919, 25; 1920, 17.
Note.—Papua,
Annual Report, fiscal year ending June 20, 1920, 100 ounces osmiridium;
no data for production in previous years. Russia, 1920, 21 poods
(11,060 troy ounces), Econ. Rev., Dec. 23,1921.
PLATINUM DEPOSITS.
UNITED STATES.
The
Salt Chuck palladium-copper mine in Alaska was not operated in 1921,
though one shipment of concentrates produced in 1920 was sent to the
United States. The output of placer platinum came mainly from Dime
Creek, on Seward Peninsula.
California
dredges produced practically all the crude platinum reported for 1921,
a total of 821 ounces. Of this quantity 486 ounces came from the
streams of the mother lode region and 335 ounces from Trinity County. A
large part of the Trinity County crude platinum is osmiridium,
recovered from Beegum and Hayfork creeks and by the dredges on Trinity
River.
A
large part of the 91 ounces of crude platinum reported by Oregon miners
was produced at the beach mines in Coos and Curry counties, though some
crude platinum was saved from the mines near Kerby and Waldo, in
Josephine County, and near Sumpter, in Baker County.
The
Electrolytic (formerly Rambler) mine, near Holmes, Albany County, Wyo.,
was under development during the year, and a car of ore was shipped
principally for its copper value.
A
number of platinum booms were launched in 1921, notably one based on
reports of rich platinum ore 11 miles from Winnemucca, Nev., and
another on a reported deposit of platinum near Batesville, Ark.
CANADA.
The
largest production of platinum metals in Canada comes from the refiners
of the Sudbury nickel-copper ores. The International Nickel Co. closed
its mines and refinery September 1, 1921. The Mond Co. is the only one
now operating.
COLOMBIA.
Two
dredges of the South American Gold & Platinum Co. were in operation
in Colombia throughout the year, and a third dredge was expected to be
in operation early in 1922. The boat of the British Platinum & Gold
Corporation is reported to have made satisfactory
' For more complete data see pp. 513-564.
